A couple sitting on a park bench reviewing legal documents about marriage requirements

How Common Law Marriage Actually Works

Most people have heard the term “common law marriage,” but few understand what it takes to qualify for one. The popular version goes something like this: live together long enough and the state considers you married. That is not quite right.

A common law marriage is a legally recognized union between two people who have not obtained a marriage license or had a formal ceremony. Instead, the couple establishes their marriage through mutual agreement, cohabitation, and public representation as spouses. In the states that recognize it, a valid common law marriage carries the same legal weight as a licensed one, granting identical rights under both state and federal law.

The catch is that only a handful of U.S. states still allow new common law marriages, and each one sets its own rules for what qualifies.

Before getting into common law specifics, it helps to understand what a standard legal marriage requires. In most U.S. states, a couple must:

  • Apply for and receive a marriage license from a county clerk or registrar
  • Have the ceremony performed by someone legally authorized to officiate, such as a judge, justice of the peace, or clergy member
  • Have the completed license filed with the appropriate government office

Once those steps are done, the marriage is a matter of public record. This documentation gives married couples automatic access to spousal rights, tax benefits, and legal protections, including the legal benefits that come with marriage in states like California.

A common law marriage bypasses all of that paperwork. The question is whether the state you live in will still treat the relationship as a legal marriage.

Requirements for a Valid Common Law Marriage

The specific requirements vary by jurisdiction, but most states that recognize common law marriage look for the same general elements.

Both partners must be legally eligible to marry. This means both partners are of legal age (typically 18), neither is currently married to someone else, and both have the mental capacity to consent. These eligibility requirements mirror those for a licensed marriage.

The couple must live together for a significant period. There is no universal minimum. Despite the popular belief that seven or ten years is the threshold, no state sets a specific number. Courts look at the overall duration and consistency of cohabitation.

Both partners must intend to be married. This is the most subjective requirement. Simply living together, even for decades, is not enough. Both people must agree that they consider themselves married, and that agreement must be mutual and present-tense (not a future plan to someday marry).

The couple must present themselves publicly as married. This means holding themselves out to family, friends, neighbors, and institutions as spouses. Evidence of this can include:

  • Using the same last name
  • Referring to each other as “my husband” or “my wife”
  • Filing joint tax returns with the IRS
  • Opening joint bank accounts or signing loan documents together
  • Listing each other as spouses on health insurance forms
  • Raising children together as a family unit

No single factor is enough on its own. Family courts typically examine the full picture when deciding whether a common law marriage exists.

The "seven-year rule" is a myth. No U.S. state requires a specific number of years of cohabitation to establish a common law marriage. Courts evaluate the totality of the relationship, including intent, public representation, and shared financial obligations.

States That Recognize Common Law Marriage

As of 2026, only a small number of jurisdictions allow couples to establish new common law marriages:

  • Colorado
  • District of Columbia
  • Iowa
  • Kansas
  • Montana
  • New Hampshire (for inheritance purposes only)
  • Oklahoma
  • Rhode Island
  • South Carolina
  • Texas (referred to as “informal marriage” under Texas Family Code)
  • Utah

Several other states recognize common law marriages that were established before a specific cutoff date:

  • Alabama (before January 1, 2017)
  • Georgia (before January 1, 1997)
  • Idaho (before January 1, 1996)
  • Ohio (before October 10, 1991)
  • Pennsylvania (before January 1, 2005)

One important rule applies everywhere: if a couple establishes a valid common law marriage in a state that recognizes it, other states are generally required to honor that marriage. This obligation comes from the Full Faith and Credit Clause of the U.S. Constitution, which requires states to respect the legal proceedings and records of other states.

If you have moved from a common law state to one that does not recognize these unions, consulting a family law attorney about your specific situation is a smart step.

In states where it is recognized, a valid common law marriage grants couples the same rights as any legally married pair. These rights apply at both the state and federal level.

  • Social Security benefits. The Social Security Administration allows a surviving common law spouse to collect survivor benefits. A lower-earning spouse may also claim spousal benefits based on their partner’s work record.
  • Employer-sponsored benefits. Health insurance, retirement plans, and other workplace benefits that extend to spouses typically apply to common law spouses as well, though some employers may require proof of the marital relationship.
  • Tax benefits. Common law spouses can file joint federal and state tax returns, which often results in a lower combined tax bill for couples with unequal incomes.
  • Medical decision-making. A common law spouse can make healthcare decisions on behalf of an incapacitated partner, the same as any other spouse under state healthcare proxy laws.
  • Inheritance rights. If a common law spouse dies without a will (intestate), the surviving partner has the same inheritance rights as a formally married spouse under state intestacy statutes.
  • Property rights. Marital property laws apply to common law marriages, including community property rules in states like Texas that follow that model.

The biggest risk with a common law marriage is the absence of a marriage certificate on file. If a dispute arises over whether the marriage was valid (during a breakup, an insurance claim, or after a death), the burden of proof falls on the person claiming the marriage existed. This can be difficult and expensive to prove in court.

Protect your claim. Couples in common law marriages should keep documentation that supports the relationship: joint tax returns, shared property deeds, insurance beneficiary designations, and any written agreements acknowledging the marriage. This evidence becomes critical if the marriage is ever challenged in court.

How Common Law Marriages End

A common law marriage does not dissolve on its own. You cannot simply move out and consider yourself single again. If a common law marriage is valid, ending it requires the same legal process as ending any other marriage: a formal divorce.

This means filing a divorce petition with a family court, dividing marital property according to state law, and potentially addressing alimony and child custody. Courts treat common law divorces identically to traditional ones.

For couples who never formally divorce, the marriage remains legally valid. This can create complications years later if either partner tries to remarry (which would constitute bigamy) or if questions arise about benefits, property, or inheritance.

Protecting shared assets during a common law marriage also matters. Couples who purchase property together should make sure both names appear on deeds and titles. Without documentation showing joint ownership, the person whose name is on the title may have full legal control over that asset, including the right to sell it without the other partner’s consent. A prenuptial or postnuptial agreement can help formalize these arrangements.

Common Law Marriage vs. Civil Union

These are two different legal concepts that people sometimes confuse.

A common law marriage is an informal marriage recognized by certain states based on the couple’s behavior and intent. It receives full recognition at both the state and federal level, granting all the rights of a licensed marriage.

A civil union is a formal legal status that was created primarily to give same-sex couples access to state-level rights and benefits before the U.S. Supreme Court’s 2015 ruling in Obergefell v. Hodges legalized same-sex marriage nationwide.

Civil unions are still available in a few states, but they do not carry federal recognition. This means civil union partners may not qualify for Social Security spousal benefits, federal tax filing as married, or other federal protections that married couples (including common law spouses) receive.

When a Licensed Marriage Makes More Sense

For couples who live in a state that does not recognize common law marriage (which is the majority of U.S. states), the only path to legal spousal rights is a courthouse wedding or other formally officiated ceremony.

Even in states that do recognize common law marriage, many couples find that getting a marriage license is simpler. A license creates a clear, documented record of the marriage. There is no ambiguity, no need to prove anything in court, and no risk of a dispute over whether the marriage was real.

A city hall ceremony can be as low-key as walking into the clerk’s office on a Tuesday afternoon. Couples who are considering this route should know about the common mistakes people make when planning a courthouse wedding so they can avoid them. And for those thinking about what comes after the ceremony, there are plenty of reception ideas to consider after a courthouse wedding.

Ready for a legal ceremony? Check what your state requires for a marriage license, find out who can legally officiate your wedding, and read up on important things to know before getting married.

Making the Right Choice for Your Relationship

The legal protections that come with marriage are real and significant. Whether you qualify for a common law marriage or decide to walk into your local courthouse for a license, understanding your rights is the first step.

If you live in one of the states that recognizes common law marriage and your relationship meets the requirements, you may already have legal protections you did not know about. If you are unsure, a family law attorney can review your situation and advise you on your options.

For couples who want clear documentation and fewer potential disputes, a licensed marriage offers the most straightforward path. The ceremony itself does not need to be elaborate. Many couples find that choosing the right wedding date and setting a realistic budget are the only planning steps they need.